Uterine fibroids, also known as leiomyomas, are the commonest uterine neoplasms. Although benign, they can be associated with significant morbidity and are the commonest indication for hysterectomy. They are often discovered incidentally when performing imaging for other reasons. Usually first identified with USG, they can be further characterized with MRI. They are usually easily recognizable, but degenerate fibroids can have unusual appearances. In this article, we describe the appearances of typical and atypical uterine fibroids, unusual fibroid variants and fibroid mimics on different imaging modalities. Knowledge of the different appearances of fibroids on imaging is important as it enables prompt diagnosis and thereby guides treatment.

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Background/Aim: To evaluate the role of MRI in patients with atypical endometrial hyperplasia (AEH) and incorporate MRI findings in predictive models estimating the risk of co-existent endometrial cancer (EC). Patients and Methods: Data from 189 women diagnosed with AEH and had MRI scan prior to operation, over nine years, were retrospectively collected. Results: Histology showed EC in 51 (27%) cases. Presence of myometrial invasion on MRI was more commonly detected in patients with EC compared to those with benign pathology (37.3% versus 10.9%, p<0.001). The sensitivity and specificity of MRI in identifying cancer were 37% and 89%, respectively. Age, menopausal status and presence of invasion on MRI were the best predictors for the presence of malignancy. Conclusion: Myometrial invasion on MRI is associated with increased risk of EC in women with AEH. Its accuracy in detecting malignancy improves when combined with clinical parameters. This could be of value for conservativemanagement candidates.

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